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Stress Evaluation on Materials Having Non-Linear Lattice Strain Distributions

Published online by Cambridge University Press:  06 March 2019

Viktor M. Hauk
Viktor M. Hauk*
Affiliation:
Institut für Werkstoffkunde, Rhein. Westf., Technische Hochschule, D-5100 Aachen, Bundesrepublik Deutschland
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Abstract

The state of the art of stress evaluation on materials having non-linear lattice strain distributions is presented.

New results on heterogeneous materials with measurements conducted on both phases of the material show compensation of the shear stress components σ13 in ground surface layers of (α+β) brass. There is only the compensation of normal components σ11 of (α+γ) steel after plastic straining.

The fundamental aspects and the evaluation of macro- and microresidual stresses on materials having preferred orientation are broadened. The use of Mo-Ka-radiation shows linear lattice strain distributions, as a result of minimizing the influence of micro residual stresses causing oscillations. The interplanar distance- or strain-polefigure shows similarities with the intensity polefigure.

The knowledge of the theoretical influence of stress distribution with depth from the surface of the material is extended. The experimental procedure should use either different radiations having different penetration depths or a low-penetrating radiation in combination with removal of surface layers.

Information

Type
II. X-Ray Strain and Stress Determination
Information
Advances in X-Ray Analysis , Volume 27: Thirty-Second Annual Conference on Applications of X-ray Analysis, August 1-5, 1983 , 1983, pp. 101 - 120
Copyright
Copyright © International Centre for Diffraction Data 1983

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References

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